EPIC filed a "friend of the court" brief in the United States Supreme Court urging the Court to limit the scope of pervasive GPS surveillance by upholding robust Fourth Amendment protections. Along with 30 legal and technical experts, EPIC argued that 24-hour GPS surveillance by law enforcement constitutes a "search" under the Fourth Amendment. US v. Jones involves the government's use, without a judicial warrant, of a GPS device to track a person "24/7." The lower court held that "the use of the GPS device violated [Jones'] 'reasonable expectation of privacy,' and was therefore a search subject to the reasonableness requirement of the Fourth Amendment." Arguing in support of the earlier decision, EPIC said "it is critical that police access to GPS tracking be subject to a warrant requirement." For more information, see EPIC: US v. Jones, and EPIC: Locational Privacy.